Vulnerability in Red Hat Enterprise Linux 10
CVE-2026-18726
A flaw was found in open-iscsi. This vulnerability allows a remote attacker on the same local network segment to cause a Denial of Service (DoS) in the iscsiuio daemon. By sending a specially crafted Internet Control Message Protocol version 6 (ICMPv6) Router Advertisement with a zero-length option, the attacker can trigger an infinite loop. This leads to sustained CPU usage, rendering the daemon unresponsive and impacting system availability. A secondary risk of out-of-bounds reads exists with a short IPv6 payload, though no memory corruption or data exposure has been confirmed.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux — versions 10.0, 9.0
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-18726 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
Frequently asked questions
- What is CVE-2026-18726?
- CVE-2026-18726 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.5/10. Published 2026-08-12.
- How severe is CVE-2026-18726?
- Medium severity. CVSS v3 base score is 6.5 out of 10.